GRADES BURAB Typical analysis % Application/Properties

Transcription

1 Cold-rolled strip

2 Cold-rolled strip SIZE RANGE EDGES Slitted mm Deburred 4,00 Round Straight FINISHES Blue Bright Extra bright* *according to agreement Strip thickness DELIVERY FORM Coils. Oscillated coils* Straightend and cut to lengths max mm * see special product sheet GRADES COIL SIZES PACKING BURAB Typical analysis % Application/Properties C Si Mn Cr B Coil weight: according to agreement, max 9 kg/mm strip width Inside diameter: 200 mm to 500 mm Outside diameter: according to agreement Coils are supplied slightly oiled on EUR pallets. Straight lengths are supplied slightly oiled in bundles. Packing and pallet type according to agreement max For extreme deep drawing. Excellent weldability. Cu max. 0.10%. Age-resistant max For standard deep drawing. Excellent weldability max max For pressings that require high strength and elongation. Good weldability max Suitable for parts that are to be casehardened. Excellent weldability. Silicon fully killed Suitable for parts that are to be casehardened. Where strength requirements are higher than grade Good weldability. 02B approx Boron steel. Used where wear resistance, hardness and toughness are required. Good hardenability. Excellent weldability. Good formability. Galvanized Hot-dip galvanized and aluzinkstrip galvanized steel. Cold-rolled where strength requirement is higher than usual. Permits a finer surface and closer tolerances mm Strip width

3 Mechanical properties TENSILE STRENGTH ELONGATION Typical tensile strength (Rm) in N/mm 2 (1 N/mm 2 = 1 MPa). Elongation A 10 in %. Permissible variation in tensile strength ± 60 N/mm 2. BURAB annealed special 1/4-1/2-3/4- special soft-rolled soft-rolled cold-rolled cold-rolled cold-rolled cold-rolled cold-rolled /45 340/40 380/25 450/15 500/ /40 350/32 390/22 460/12 510/6 610/4 640/ /37 390/28 410/18 510/10 550/7 620/4 650/3 740/ /40 390/30 410/20 510/12 560/8 630/5 660/4 750/ /35 440/28 480/18 540/11 600/7 660/5 720/4 780/3 02B 500/25 550/11 Galvanized strip according to agreement. EFFECT OF ROLLING ON FORMABILITY OF STRIP (C 0.10%) Hardness Annealed Special hot-rolled Hot-rolled Formability Excellent deep drawing ability. Tolerates sharp 180º bend both transverse to and parallel with rolling direction. Excellent deep drawing ability. Tolerates sharp 180º bend both transverse to and parallel with rolling direction. Tolerates sharp 180º bend transverse to rolling direction, and 120º bend over a sharp edge parallel with rolling direction. 1/4-cold-rolled Tolerates sharp 180º bend transverse to rolling direction, and almost 90º bend over a sharp edge parallel with rolling direction. 1/2-cold-rolled 3/4-cold-rolled Cold-rolled Special cold-rolled Tolerates sharp 180º bend transverse to rolling direction, and around 75º bend over a sharp edge parallel with rolling direction. Tolerates around 120º bend over sharp edge transverse to rolling direction and around 45º parallel with rolling direction. Tolerates around 90º bend over sharp edge transverse to rolling direction and around 20º parallel with rolling direction. Does not tolerate bending in either direction. BENDING RADIUS The table is based on a test in a V-bend tool with a die opening of 20 mm. The edges of the test samples are punched and the resulting burr is turned inwards during bending. Strip thickness max. 2.0 mm. Bending 90º. Minimum bend radius for various degrees of rolling. a = strip thickness. BURAB Bending orientation* annealed special 1/2- soft-rolled soft-rolled cold-rolled cold-rolled /1 0/0 0/0 0.5a/0 a/ /1 0/0 0/0 0.5a/0 a/0 10a/ /1 0/0 0/0 0.5a/0 5a/0 10a/ /1 0/0 0/0 0.6a/0 5a/0 10a/0.5a /1 0/0 0/0 0.5a/0 5a/0 10a/0.5a 02B 11/1 1.5a/1a 2,5a/1,5a Galvanized strip according to agreement. *11 bending parallel with rolling direction. 1 bending transverse to rolling direction. 3

4 Tolerances THICKNESS Thickness Width mm mm under / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Closer tolerances available according to agreement. WIDTH Thickness Width mm mm / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /-0.50 Closer tolerances available according to agreement. LENGTH Length mm Tolerance mm Closer tolerances available according to agreement. STRAIGHTNESS Strip width mm Measured length mm 10-(40) 40-(125) >125 Permissible deviation from straight mm Calculation: Lateral deviation from straightness for different measured lengths is calculated using the formula: H= h L2 l 2 4

5 Conversion table VICKERS BRINELL TENSILE STRENGTH OF COLD-ROLLED STRIP (typical values) Vickers Brinell Tensile strength HV HB N/mm

6 Metre weights THEORETICAL WEIGHTS FOR STRIP (kg/metre) DENSITY: 7850 kg/m 3. Width Thickness mm mm Width Thickness mm mm

7 Metre weights THEORETICAL WEIGHTS FOR STRIP (kg/metre) DENSITY: 7850 kg/m 3. Width Thickness mm mm Width Thickness mm mm

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